#include<stdio.h>
#include<unistd.h>
#include <sys/types.h> 
#include <unistd.h>

int main()
{
   printf("I am a process,pid:%d,ppid:%d\n",getpid(),getppid());

   pid_t id = fork();
   if(id>0)
   {
       while(1)
       {
           printf("我是父进程:pid: %d ppid: %d\n",getpid(),getppid());
           sleep(1);
       }
   }
   else if(id ==0)
   {
       while(1)
       {
           printf("我是子进程:pid: %d ppid: %d\n",getpid(),getppid());
           sleep(1);
       }
   }
   

   // while(1)
   //{
       // printf("hello world,%d,%d\n",getpid(),getppid());
      //  sleep(1);
    //}
    return 0;
}
